Re: [PATCH 2/2] ARM: dts: imx7: add USDHC NAND clock to SDHC instances

[Fabio Estevam]

On Mon, Apr 10, 2017 at 11:59 PM, Dong Aisheng <dongas86@xxxxxxxxx> wrote:

> This is caused by ahb_root_clk gets disabled accidently and system hangs.
>
> Because this patch defines ipg_root_clk earlier before its parent
> (ahb_root_clk) got registered, then it will be marked as a orphan clk
> temporarily. Until the parent ahb_root_clk got registered, the clk core
> will reparent it to the newly found parent. (see __clk_core_init() function).
>
> Due to CLK_SET_RATE_PARENT flag, the ahb clk will be enabled during
> set_parent operation and then disabled after that.
> Then system hang cause we still get no chance to run init_on clks.
>
> I just send out a proper fix patch with correct register sequence.

Excellent, thanks!